Registrations for the SMITE Xbox One Beta are live HERE.
You only need to fill in your e-mail (twice) and agree to the terms and conditions and that you are 13+ years of age.
After signing up, you will receive the following message:
You’re now registered to join the SMITE Xbox One beta test.
We will begin sending out a limited quantity of beta invites in the coming months. These will be distributed randomly among all registered players, and registration does not guarantee participation. If you are selected, you will receive an email from email@example.com with a beta key that can be redeemed on Xbox Live.